42768438421 has 8 divisors (see below), whose sum is σ = 43781221440. Its totient is φ = 41756481312.

The previous prime is 42768438413. The next prime is 42768438437. The reversal of 42768438421 is 12483486724.

42768438421 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 42768438421 - 2³ = 42768438413 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42768438451) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 101056 + ... + 309433.

It is an arithmetic number, because the mean of its divisors is an integer number (5472652680).

Almost surely, 2^42768438421 is an apocalyptic number.

It is an amenable number.

42768438421 is a deficient number, since it is larger than the sum of its proper divisors (1012783019).

42768438421 is a wasteful number, since it uses less digits than its factorization.

42768438421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 412955.

The product of its digits is 2064384, while the sum is 49.

The spelling of 42768438421 in words is "forty-two billion, seven hundred sixty-eight million, four hundred thirty-eight thousand, four hundred twenty-one".